Chair



FIG. 1 shows a front perspective view of the design for a chair;

FIG. 2 shows a top perspective view thereof;

FIG. 3 shows a bottom perspective view thereof;

FIG. 4 shows a rear perspective view thereof;

FIG. 5 shows a right side perspective view thereof; and,

FIG. 6 shows left side perspective view thereof.

The fragmented cross-hatching shown on the seat and backrest is understood to represent fabric. 

The ornamental design for a chair, as shown and described. 